CompatHelper: bump compat for Flux to 0.15, (keep existing compat)

Author: CompatHelper Julia

Project.toml

@@ -28,7 +28,7 @@ Artifacts = "1"
 BSON = "0.3.2"
 CUDA = "4, 5"
 ChainRulesCore = "1"
-Flux = "0.13.16, 0.14"
+Flux = "0.13.16, 0.14, 0.15"
 Functors = "0.4, 0.5"
 JLD2 = "0.4, 0.5"
 LazyArtifacts = "1"